Improvement in paper-bag machines



3 Sheets-Sheet 1.

. H. LAW. PAPER BAG MACHINE.

'110,104,169. PatentedJune 14, 1870.

1H: Nonms PETERS co. aHoYcAITHo, wAsmNuToN. n c.

3 Sheets- Sheet 2.

H. LAW. PAPER BAG MAGHINB.

116.104,16). Patented June 14, 1870.

TH: Noms Pzrsns co., pnnmurm., wnsrjmmou, o. c.

3 sheets-sheet 8.

H. LAW. PAPER BAG MACHINE.

No. 104,169. Patented June 14, 1870.

" UNITED STATES PATE HERYEY LAW, OF GHATHAM, NEW JERSEY.

IMPROVEMENT IN PAPER-BAG MACHINES.

Specification forming part of Letters Patent No. 104,169, dated June 14,1870.

To all whom 'it may concern .L

Be it known .that I, HERVEY LAW, of

d Chatham, in the'county of Morris and State devices arranged so as to form automatically' vpaper-bags, such as are used for lour,&c.,

and which are made in onepiece from the roll of paper.

The paper is folded in the direction of its .length from the two sides, so that the edges overlap oneanother about an inch in the center; the edges are then pasted together. There are machines already in use for folding the paper in this way, which I use in combination with my invention. The paper is drawn through the folding-machine withthe seam'on th'e 'upper -side centrally by a pair of roliers, which feed it along to the devices for forming the bottom of the bag. The feed-rollers then stop'nntil the bottom is formed, and the bag cnt oli'the required length, when they again feed the paper forward, pushing out of the machine the bag already formed, and so on, making abag to everyvrevolution of the machine. But to describe my invention more particularly,so that those versed in the arts and manufactures may be enabled to construct and use the same, I will refer to the accompanying drawings, forming a part of this specii l cation, in which- Figure 1 is a plan; Fig. 2 is a sectional elevation through the center ofy the machine; Fig. 3 is a front elevation 5 Fig. 4 isa partial side elevation, and Figs. 5 and 6 are views of the bottom of the bag.

The side frames a and al are fastened together by' the'rods a2 a3 a4, and are provided with bearings, in wh ich the main shaft b works, which is driven by the counter-shaft b2 and 'wheel and pinion b3 b4.

wheels elr The paper is drawn through the formeror folder a5, and one of the edges pasted by the pasting-roller a6, and fed the required length by the feed-roller d and d. On the-shaft ofroller d is fastened the pinion d2, which is driven by the segmental wheel d3 fast-to the main shaft b. The length of paper fed along for different size bags ,is 'governed The side shaft c is; driven by the main shaft b through the miter` by the number of teeth in the pinion d2. VJ ust in front of the feed-rollers d and d1 is the knife e for cutting oi' the bag, and under which the paper passes as it leaves the feed-rollers. The knife is pressed down after the feed has stopped, by the cam el on the side shaft c, raising the outer end of the lever c, the inner end of which is connected with the slide to whichithe knife is attached. Fastened to the knife e are two small knives, e3, standing at right angles thereto, for slitting the paper, as

lshown at Figs. 5 and 6, the object of which will be explained hereafter. The knife is raised away from the paper by the spring c4 fastened to the lever e2, and the frame al;

Bolted to the frames a and a1 is the bed f standing vertically, against which the bottom of the bag is formed, the upper portion j" of which slides in bearings provided therefor, so as'to allow the paper to feed through the center of the bed. The part fl is4 raised by the cam f2 fastto the shaft c working against a projection at the end of the small shaft/f3, which is provided with a wiper, f4, working under the lug f5 on the back 'of the sliding portion f1 ofthe bed f. It is raised just before the paper commences `to feed, and held open until the feed stops. Then the cam f2 releases the shaft f3, the slide f1 falls of its own weight and holds the paper fast. So soon as the paper is fed forward and held firmly f the fingers g and g1, which have a continuous rotary motion,and which are driven by the -belt or chain 9v2 from the main shaft l) onto the lower finger-shaft, are in the position shown in thedrawings. The object of these ngers is to open orspread out the end of paper, so

as to assist the irst 'folders h and h1 in -their operation. The fingers g and gl are connected together by the belt or chain g3.

The first folders h and h are pivoted to slides h2 h3, working in guides on the bed f, and having a horizontal motion-that is, to and from the center of the bed. The counec ion between the folder h and h1 and the s des h2 h3 are made sufliciently tight, so as lio/overcome the friction ofthe slides h2 It" in the guides, or they may be provided with spgngs, which will hold the folders at right aigles to the slides when they are heilig movedv forward until the slides are prevented from going any farther then the folders are thrown down NT QEFIQEE' against the bed f', or in a parallel position to the slides. They are withdrawn in this position until the slides are again stopped, when 'the folders are raised again at right angles to the slides, and are moved forward until they get t0 the position shown in the drawings. To the folders h h1 are -pivoted the connecting- 1inksh'4h5. The other end of h5 is slotted so as to embrace the shaft c, and vis also provided with a roller, h6, against which the cam hworks The motions of the lirst two folders h and h1 are similar, and which folders are connected togetherby the lever ha, one end of which is connected to the connecting-link 11,5. The fulcrum is -at the other end hf on a bracket from the side frame a. The 'cranked rod IL10 is pivoted -to the lever It at It", and to thele- Ik12, whose fulcrum is ath, which is connected with the folder h by the 'connecting-link hr1. The rod h1 is cranked so as to allow the finger g' to pass, and to it is fastened the spring k1f1, which isso placed as to cause the roller h6 o n the connecting-link h5 to press against the cam h`1. The folders l1. and h1, which are thrown down against the bed f bythe cam 11.7,' press,

against the edges and open the ends of the paper, which is inthe form of a at tube. At the Y same time the fingers g "and g enter and aid in spreading out'the end of the liattube of paper at right angles to the motion of vthe vfolders. Afterthe lirst fold the bottom of the bag would appear as shown at Fig. 5. y 'y' are the slits made bythe small knives e. The object of cutting the paper in this way is to get rid of the lump there would otherwise beafter the second fold, as these parts overlap one another in the 'center of the bag, as

shown at Fig. 6. While the lirst folders h and h1 are'holding the paper, as just shown,

the pastel-'f works forward and pastes the paper on the parts marked m, Fig. 5, and also if found necessary a strip in the center about an inch wide marked z. The paster t is shaped 4in the form of the parts tobe pasted, and is hinged to an arm, i1, which is fast to a vertical shaft, il, working in bearings provided therefor on brackets from the frame a. 0n the lower end of the shaft i12 is fastened the crank 113, which is connected to the bell-crank lever i4, whose fulcrum is at 115 on the framed,

by the rod t6. Fastened to the shaft b isfthe cam il, which operates the'short' arm of the` 'bell-crank lever t4. Attached to the frame a, 'and to the long arm ofthe lever t4, isa spring',

vt, which operates against and-keeps the short arm of the lever i4 against the cam i7. On the bearings which carrythe vertical shaft 'i2 is fastened the bracket i9, which supports the pastepot and rollcrs. At the extreme end is a standard, to which is bolted the guideplate @'11, which holds the pastert' in a horizontal position, as shown in the drawings.

.The operation of the paster is as follows: The cam t7, in depressing the short arm of the bell-'crank lever i4, partially revolves the crank 113 on the bottom of the shaft 112, and consequently moves the paster round toward the position, in which position it presses against.l

the paper and leaves thereon sufficient paste; it 'is then moved back by the action` ofthe springkt, when the stud 12, striking the inclined portion of the guide-plate, moves thel paster into a horizontal 'position again, 1n

which position it passes .over and takes up some of the paste from the 'paste-roller i1".

To prevent the .pasten/a' frompressing t0 0. hard on the paste-roller t1 the roller-shaft `1s tted With the friction-Wheel 14, which is a' littlelargerthan the pasteroller, and which` works against the depressed portion '15 of the pasterfh The paste-roller is made to revolve by the .friction-wheel 14 bearingagainst the.

portion z'15`of the paster, and the right quan-l tity of pasteis left on the paster'; otherwise the pastor itself, pressing hard on the panter.`

roller, would be liable'to crowd the paste od. When 'the pasteri moves up against the bed f the second folders Zand m turn on their centers to a position in line with the bed f, making a fiat surfacev for the paster vto press against, before which motion the folders l andy m are in the position shown in the drawingsthat is, they incline back from the bed f to.

allowthe tingers'g g to pass,as itl'is necessary to makethe iiugers work as close to the bed f as possible. 'Assoon as the pasteri has moved away from the paper, and beforethe 'first folders h and h move, the secondfolders .landm' turn over on their centers so as 5to partly make the -second fold. The upper one, t, works on centers on the top .of' the sliding portion` f1 of the bed'f, and the lowerone, m, on centers on the bedf, they each having a pinion on theirshafts, l1 and- .m1, which are. worked by the rack's on therods Pm?. The' other ends of these rods are slotted so as'to work on the shaft b. The cams Z3 m3 are fast to the shaft i), and work against the .rollers Z4.'

closed-the first folders h h' are withdrawn, as

already described. The second folders -l and m are then moved round'their full distance, so as to press the paper down and leave. it as shown at Fig. 6; they are then opened, as shown in the drawings, by the action of the springs Z5 and m5, which are fastened to the yrods Pand m2 and to the frame a; the sliding portion of the'bed is raised by the'cam f2, and

the rollers d and d commence to feed the paper forward, pushing ont of the machine the bag just formed. n u n are wires for guiding the paper from the feed-.rollers te the bed f of the machine. If found necessary, another pair of rollers may be placed just Vbehind thebed, so as to assist in discharging the bag from the machine.

circumferential velocity, which will tend to They may be runfby a. belt from the other rollers and have a greater A tear the bag from the paper if the knife does 3. The pastori, constructed and operated not make a clean out. substantially as described.

What'I claim, and desire to secure by Let- 4. The second folders land m, in combine.i ters Patent, istion with thepaster i, substautilly as de 1. The folders h h,eoustr11oted and operated scribed. substantially as described. 2. The fingers g and g', in combination with Witnesses: the folders h and h', constructed and operated JOHN R. MARSTON, v substantially as described. ALFRED SHEDLOGK.

HERVEY LAW. 

